KS

src/main/java/com/zipcoder/payment/Check.java

     private String routingNumber;
     private String accountNumber;
 
-    Check(){
-        ID = 1234567891;
-        payerName =  "Tia Mowry";
-        routingNumber = "34343456";
-        accountNumber = "***4551";
+
+
+    public Check(long ID, String tia_mowry, String routingNumber, String accountNumber) {
+
+    }
+
+    public Check() {
+
     }
 
     public Long getID() {

src/main/java/com/zipcoder/payment/PaymentPresenter.java

 
 public class PaymentPresenter {
 
-
-
+    public String toString(Payment[] payments) {
+        return null;
+    }
 }

src/main/java/com/zipcoder/payment/Paypal.java

     private String payerName;
     private String email;
 
+    public Paypal(long ID, String payerName, String email) {
+        this.ID = ID;
+        this.payerName = payerName;
+        this.email = email;
+    }
+
     Paypal (){
         ID = 1234567891;
         email = "tia@mowry.com";

src/test/java/com/zipcoder/payment/CheckTest.java

     @Test
     public void compareTo1(){
 
-        int expected = 0;
-        int actual = cc.compareTo(cc);
+        int expected = 1;
+        int actual = ch.compareTo(cc);
         assertEquals(expected,actual);
     }
     @Test
     public void compareTo2(){
 
         int expected = -1;
-        int actual = cc.compareTo(ch);
+        int actual = ch.compareTo(pay);
         assertEquals(expected,actual);
     }
     @Test
     public void compareTo3(){
 
-        int expected = -1;
-        int actual = cc.compareTo(pay);
+        int expected = 0;
+        int actual = ch.compareTo(ch);
         assertEquals(expected,actual);
     }
 }

src/test/java/com/zipcoder/payment/CreditCardTest.java

         assertEquals(expected,actual);
     }
     @Test
+    public void compareToAnotherCreditCard() {
+        int expected = 0;
+        cc.setPayerName("A");
+        cc.setNumber("1235454");
+
+        CreditCard bCreditCard = new CreditCard();
+        bCreditCard.setPayerName("A");
+        bCreditCard.setNumber("1235454");
+
+        int actual =  bCreditCard.compareTo(cc) ;
+
+        assertEquals(expected,actual);
+    }
+
+    @Test
     public void compareTo1(){
 
         int expected = 0;

src/test/java/com/zipcoder/payment/PaymentPresenterTest.java

 package com.zipcoder.payment;
 
+import org.junit.Test;
+
+import static junit.framework.TestCase.assertEquals;
+
 public class PaymentPresenterTest {
+    @Test
+    public void testToString(){
+        Payment[] payments = new Payment[0];
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "";
+
+        String actual = presenter.toString(payments);
+
+        assertEquals(expected, actual);
+    }
+    @Test
+    public void testMultiplePayments(){
+        Payment[] payments = new Payment[2];
+        Payment Paypal = new Paypal(4L, "Tia Mowry", "tia@mowry.com");
+        Payment check = new Check(81L, "Tia Mowry", "11432543", "134344551");
+
+        payment[0] = Paypal;
+        payment[1] = check;
+
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "Check Tia Mowry ***4551\nPaypal Tia Mowry tia@mowry.com\n";
+
+        String actual = presenter.toString(payments);
+        assertEquals(expected, actual);
+    }
 }

src/test/java/com/zipcoder/payment/PaypalTest.java

     @Test
     public void compareTo2(){
 
-        int expected = -1;
+        int expected = 1;
         int actual = pay.compareTo(cc);
         assertEquals(expected,actual);
     }
     @Test
     public void compareTo3(){
 
-        int expected = -1;
+        int expected = 1;
         int actual = pay.compareTo(ch);
         assertEquals(expected,actual);
     }